-Re: INSERT INTO table with STRUCT, SELECT FROM
Dean Wampler 2013-02-13, 19:47
Hmm. I tried the following hacks, but all wouldn't parse. Ideas?
... select struct(x,y) ...
... select struct(x,y) as struct<a:int,b:int> ...
... select cast(struct(x,y) as struct<a:int,b:int>) ...
... select struct(x as a,y as b) ...
Okay, but there is a hack that does work; By pass INSERT INTO and just
write to the directory:
INSERT DIRECTORY '/path/to/table/directory' SELECT ...;
Just be careful it doesn't clobber any files already there. I'm paranoid,
so I would write to a different directory and then move the files over...
On Wed, Feb 13, 2013 at 1:26 PM, Michael Malak <[EMAIL PROTECTED]>wrote:
> Is it possible to INSERT INTO TABLE t SELECT FROM where t has a column
> with a STRUCT?
> Based on
> I thought perhaps the following would work:
> echo 1,2 >twovalues.csv
> CREATE TABLE tc (x INT, y INT) ROW FORMAT DELIMITED FIELDS TERMINATED BY
> LOAD DATA LOCAL INPATH 'twovalues.csv' INTO TABLE tc;
> CREATE TABLE oc (z STRUCT<a: int, b: int>);
> INSERT INTO TABLE oc SELECT struct(x,y) FROM tc;
> but when I do the above I get:
> FAILED: SemanticException [Error 10044]: Line 1:18 Cannot insert into
> target table because column number/types are different 'oc': Cannot convert
> column 0 from struct<col1:int,col2:int> to struct<a:int,b:int>.
*Dean Wampler, Ph.D.*